Murdoch University Research Repository

Welcome to the Murdoch University Research Repository

The Murdoch University Research Repository is an open access digital collection of research
created by Murdoch University staff, researchers and postgraduate students.

Learn more

Fluoride solvation-the case of the missing ion

Hefter, G.T. (1991) Fluoride solvation-the case of the missing ion. Pure and Applied Chemistry, 63 (12). pp. 1749-1758.

[img]
Preview
PDF - Published Version
Download (678kB)
Link to Published Version: http://dx.doi.org/10.1351/pac199163121749
*Subscription may be required

Abstract

The thermodynamics of fluoride ion solvation in nonaqueous and mixed aqueous solvents are reviewed. Gibbs energies of transfer , ∆tG⁰ (F -) H20-s , indicate that the solvation of the fluoride ion is dominated by hydrogen bonding. Thus, ∆tG⁰ (F -) H20-s is unfavourable for virtually all solvents, especially dipolar aprotics, and correlates well with solvent acceptor strength. The corresponding enthalpy and entropy data are few and are of low quality but suggest F- solvation is entropy controlled: the only ion known to be so. In mixed aqueous solvents the values of ∆tG⁰ (F -) H20-s generally increase monotonically with declining water content. However, this results from the fortuitous cancellation of dramatic, but largely opposing, variations in ∆tH⁰ and ∆tS⁰. The complex changes in these parameters are related to subtle changes in ion-solvent and solvent-solvent interactions. Finally, a relationship between fluoride and hydroxide solvation is proposed.

Item Type: Journal Article
Murdoch Affiliation(s): School of Mathematical and Physical Sciences
Publisher: International Union of Pure and Applied Chemistry
Copyright: @ IUPAC
URI: http://researchrepository.murdoch.edu.au/id/eprint/1549
Item Control Page Item Control Page

Downloads

Downloads per month over past year